Earlier quoted context omitted.
In an ideal society, I totally agree. However, in today's world, such data will mostly be exploited by health insurance companies, credit rating agencies, employers, and paparazzi. Unless, of course, the government(s) pass laws that protect the rights of the people and limit the influence of the industry, but that is rather the opposite of what has been happening recently.
It's not so much health insurance companies I'm worried about, as they will probably have access to medical information about their clients anyway, and organisations like BUPA probably do take patient confidentiality seriously. I'm more concerned about other forms of insurance, and about links to people related to you and not you personally. For example, what if people start getting a higher car insurance quote becau…
It's only the commercial exploitation I'm worried about - it has a lot of potential to meaningfully impact human lives, usually for the worse, and often because of things said humans have no influence on.
Though for those living in totalitarian/fascist societies (e.g. gays in Putin's Russia) have much better reasons to be concerned.